US40097A - Improvement in rock-drilling machines - Google Patents

Description

J. S. FRENCH. ROCK DRILLING MACHINE.

No. 40,097. Patented Sept. 29, 1863.'

UNITED STATE-s PATENT OFFICE.- ,c

JOHN S.VFRENO,H, OF SAN FRANCIS-OO, CALIFORNIA.

' IMPROVEMENT iN ROCK-DRILLING MACHINES.

To all whom it may concern:

Beit known that I, JOHN S. FRENCH, of San Francisco, in the county of' San Francisco and State of California, have invented a new and Improved Roch-Drilling Machine; and I do hereby declare that the following is affull, clear, and exact description of the same, ret'- erence being had t the accompanying drawings, making a part of this specication, in whichy Figure l is a side sectional view ot' my invention taken inV theline .fr x, Fig. 3; Fig. 2, a. Vertical section ofl the same taken in the line y y, Fig. l 5 Fig. 3, a plan or top view of the same; Fig. 4, an enlarged detachedfront View of the mechanism which rotates the drill; Fig. 5, an enlarged detached longitudinal view of the mechanism which connects the drill with the draw-back slide.

This invention relates to a new and improved rock-drilling machine fortunneling and-other purposes; and it consists in constructing and arranging the parts in such amanner that the drill may be turned and adjusted in either a vertical or a horizontal plane, so that holes' may be bored in any desired direction-that is to say, either vertically, horizontally, or at any degree of inclination between said posi- 'tions and at any point in a circle, the plane of which coincides or is parallel with the axis of the drill. c

The invention further consists in a novel arrangement vof means for operating the drill, whereby the same is drawn back from the hole after each stroke and turned while being drawn back, thus imitating or corresponding with the ordinary hand-manipulation of rockdrills, the blow being given the drill by'means of a hammer koperated by a cam and springs, as hereinafter fully set forth. The machine is placed or tit-ted upon a truck to enable the drill to be readily placed lin lposition or adjusted to its work.

To enable those Skilled in the art to fully derstand and construct my invention, I will proceed to describe it.

A represents a'truck, which may be constructed of wood, provided with two small wheels, a a, at one end, and two handles, lfb, at its opposite, the whole being arranged in the same way as an ordinary handtruck; On this truck there is permanently secured an annularplate, B, of nietal, on which a metal column, O, rests, said column having a plate, D, attached to its lower end, which is slotted longitudinally, as shown at c, and through whichl slot and the truck A a screwb'olt, E,

passes, said screw-boltbeing provided with ablock, F, of metal, through wh-icha vertical screw, G, passes, said screw1 being rotated' when necessary by vmeans of bevelgears e at its upper end in order to. raiseand lower the block F, which is allowed to slide freely in C.

H-represents arms, which are secured to a horizontal pin, g, the latter passing through a.- vertical slot, h, in'the column land info the block F, as shown clearly in Fig.'2. To this block F there is also attached a horizontalarm, i, which passes through a vertical slot,l j, in the side of the column C opposite to the side in whichI the slot h is made, and on this arm the frame I of the drilling-machine is hung and allowed to turn freely. To the frame l there is secured Aa circle plate, J, which is concentric with the arm ,'on which the frame I is hung. 'This circle plate J is VprovidedA with a flange, which extends all around its periphery, andhas a lip, k, at one end of a bolt, Z, passin over it,l said bolt passing through the outer part of one of the arms H, and having a thumb-nut, m, upon it. By this arrangement it will be seen that the frame I may be yturned on the arm i and securedA at any point of an entire revolution thereon by screwing up the thumb-nut m, so that the lip k will clamp the flange j ofthe circle plate J. The frame I is raised and lowered by turning the screw Gr. In the'fupper part ot' the frame I there isplaced transversely a shaft, K, having a cam, L upon it and a-crank, n. The cam L is sim` `ply a. curved arm, as show-n clearly in Fig. 1.,

and it works against a roller, o, at one end ofl -an oblong slot, p, in a bar, M, which is ar vranged-so as to slide in the upper part of the frame I. Thisl bar M passes through the up` per partof aswinging pendent arm, N, the upper end of which is attached to a rock-shaft, 0, -in .the upper part of the framing I, and the bar M has a stop, q, upon it, which catches against the arm N and draws it back in the direction indicated by arrow 1, when the cam L draws ba'ck the bar M. This stop q may be adjusted -at different points on the bar M in order to regulate the extentof the swing of the arm N, as may be desired. The bar M each time it is relieved from the act-ion of cam L has a forward motion given it by means of springs yl?, which may be of spiral or other form. To the lower end of the arm N a hammer, Q, is attached. y

In the lower part ot` the frame I there is litted a slide, R, which has arack,1,on its upper surface, into which a pinion, s, gears, said pinion having a ratchet, t, attached to one side of it. Into the ratchet t a pawl, S, catches, which is-operated from the crankn of shaft K.

To the slide R there are attached two spiral springs, u u, one at each side, and these springs are connected by cords o o to a shaft, u', which passes transversely through the lower partot' the frame I, and has a ratchet, a', at one end, into which a holding-pawl, b', catches. -(See Fig. 3.)

At the front end of the slide R there is an upright ledge, c', which has a semicircular recess made in its upper end to receive the lower part of a circular collar, d', on the drill T, the collar being allowed to turn freely in the recess inthe ledge c. The drill is of polygonal form, and it rests in a box, V` the interior of which where -the drill rests being also of polygonal form. T he exterior of box V is of cylin drical t'orni, and is fitted in bearings e', so that it may rotate freely. The box is constructed of twolongitudinal parts of equal size, and each of said parts has a half-bevel pinion,j7, upon it, which form when -in contact, and the two parts of the box are adjusted together,a whole pinion, into which a bevel-pinion, g', gears, the pinion g having a ratchet, h', attached to it, into which a pawl, V, catches, vwhich is attached to the pawl S at i. (See Fig. l.)

The two parts of the' box Vare held together in close contact by a clamp, W, which may be arranged in any properway.

The operation of the drill is as follows: The Ashaft K may be rotated through the medium .of` any convenient power, and a swinging motion is given the hammer Q through the mel diuin of the cam L, sliding bar M, and springs P,'as previously referred to. Each timethe hammer Q is drawn back the slide Ris made to move back also, in consequence of the crank n, pawl S, ratchet t, pinion s, and rack r, and as the slide R is drawn back the drill T is drawn back with it, in consequence of the collar d on the drill heilig fitted in the ledge c' on slide R. As the slide R moves back the drill T is rotated through the medium of the gearing j7 g', the ratchet h', and pawl V. The pawl V receives its motion from the pawl S. When thepawl S loses its hold ofthe ratchet h', the springs u u force' the drill T forward, and each time the cam L passes the roller ol `be understood by the description previously' given of the adjustment of the frame I, may

be adjusted in a horizontal, vertical, or inclined position, according to the direction in which it may be required to work and at any time whena new or sharp drill requires to be inserted. The dnl-l one is removed by releasing the clamp W from the box V and detaching one part of the latter, the. sharp drill being fitted in the box V after the dull one 1s removed, and the clamp W adjusted again in proper position. This is but' the work of a moment.. The whole device may be readily moved from place to place, so that the machine lmay be adjusted in any desired position.

I would remark that the tension of the springs u u'may lbe regulated as desired by turning or adjusting the shaft w. 4

Having thus described my invention, what I claim as new, and desire to secure by Let` ters Patent, is

1. .The manner of arranging the frame-I of the machine so that it, and consequently the drill T, may be adjusted in either avertical or horizontal position or at any degree of inclina` tion between those positions and 'at any point in a circular plane' parallel with the axis of the drillto wit, by having the frame I hung. loosely on an arm, i, which-'vis attached to a block or nut, F, fitted in a vertical column, C, having avscrew, G, placed in it,l which passes'through the block or nut and the column arranged to turn on a'plate, B, 'on the truck A, the c'olulnn being retained at any Vdesired point, and also the frame I, by the means herein described, or their equivalents.

2.r The drawing back., of 'the drill T after each stroke by means of the slide R, connected with the drill through the medium of the collar d', fitting in the ledge'c on the slide,- the slide being operated by the rack r', pinion s, pawl S, and crank n on shaft K, and springs u u, or their equivalents, as set forth.

3. Rotating or turning the drill T during its backward movement by means of the box V, gearing f Q',ratchet h', and pawl V, attachld to the pawl S, substantially as set fort .4. Operating the hammer Q through the medium ofthe cam L, slide-bar M, and springs l? P, substantially as specified.

Witnessesz JOHN S. FRENCH.

Trios. S. J. DOUGLAS, A. R. HAIGHT.

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